5. If any of the above fails you need to revisit your development environment or talk to [hannes@metasolutions.se](mailto:hannes@metasolutions.se) (it may be a bug).
As you could see as the result of 4. above, the boilerplate is a very basic, but fully functional implementation of a REST API.
There are only two REST resources: a status resource that attaches to `/status` and a default resource that responds at `/`.
Implementing a new resource involves creating a new class (see `StatusResource.java` as example) and adding it to the router in `RestApplication.java`.
## Exercise
1. Implement a new resource `/echo` that responds with the request body when posting (HTTP POST) to it; it should simply mirror the request back as response.
2. Add content negotation to the echo resource and convert the payload: if the request is made with MIME type `text/csv` (i.e., `Content-Type: text/csv`), and the response is expected to be delivered in `text/html` (i.e., `Accept: text/html`), then convert from CSV to a simple HTML table. Very basic handling of the CSV payload (use the snippet from the next section) is sufficient, you don't need to use third party libraries to handle advanced CSVs with apostrophes, line breaks, etc..
Bonus for the Linked Data experienced:
3. Add support for the output format `text/turtle` (the [RDF Turtle serialization format](https://www.w3.org/TR/turtle/)) to the echo resource. Use appropriate properties from the [Dublin Core Terms metadata specification](https://www.dublincore.org/specifications/dublin-core/dcmi-terms/).
### CSV snippet
```
title,description,created
Important document,This is an important document,2022-03-31
Document your implementation in Text or Markdown format and send it along with your code as a tar.gz archive to [hannes@metasolutions.se](mailto:hannes@metasolutions.se). You can also send a link to a Git repository.